Method of saving heat.



NVENTOR 4 SHEETS-SHEET 1 Patnted June 4,. 1912,

F. H. DANIELS. METHOD OF SAVING HEAT.

APPLICATION FILED AUG. 20, 1910.

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APPLICATION FILED AUGJO, 1910v Patented June 4, 1912.

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F. H. DANIELS.

METHOD OF SAVING HEAT. APPLICATION FILED we zo, 1910 L 2885Q Patented June 4, 1912.

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Patented June 4, 1912.

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,uuuuuuugL uuuuunu WITNESSES unrrn s'ra'rns PATENT ora ion FRED H. DANIELS, or WORCESTER, MASSACHUSETTS, Assmiton TO THE AMEnIoAit STEEL AND'WIRE COMPANY on NEW JERSEY, F HOBOKEN, NEW JEEsEY, A con- IPORATION OF NEW JERSEY.

. METHOD, or SAYING HEAT..

1,028,685. Original application filed January 25,

exact description, reference being had to the accompanying drawings, forming a part of this specification. i

My invention relates to the annealing of various material in pots, and more particu 'larly relates toannealing rods or wire in such annealing pots, and the object of the invention is to provide a novel method of saving heat in annealing such materials, the apparatus preferably employed being that shown in the drawings which illustrate the construction covered-by my vco ending application Serial-No. 540,061, fied January 25.1910, for apparatus for annealing, of

.which this application is a division.

Heretofore in annealing in pot annealing furnaces, the materials being annealed remain in the furnace only for a sutficient length of time to be heated, the pots containiiigthe hotmaterials being removed while in a 'heated condition from the furnace and afterward allowed to cool, or the .pot with its contents allowed to remain in the furnace until the furnace pot and contents had become cool.

In carrying out my improvedmethod, the annealing pots which contain tl' materials to .be annealed, are introduced in the heat ing chamber of the furnace, and are. caused to gradually move through the furnace, passing successively through the heating chamber into the combustion chamber into and through the gas heating chamber also formiiig part of my improved apparatus. In this Way the pots and their contents are heated during their passage through the heating and combustion chambers become cooled gradually While passing through the gas heating chamber, and .at the same time the incoming, unburned gases become highly. heated by contact with the heated pots in the gas heating chamber, and, when entering the combustion chamber are in'a proper condition for mixing with the air therein, in order to promote combustion burn, the

Specification of Letters mat.

1910, Serial No. 540,061. 20, 1910.- Serial No. 578,113.

I chamber Divided and this application filed August through.

Patented June4, 1912 ofthe furnace whilepassing therelongitudinal sectional elevation showing in vertical section the heating chambers of a furnace adapted for use in carrying out n'iy improved method. Fig. 2 isa sectional plan showing the heating chambers of the fun.

furnace constructedand arranged accordance. with my invention. Fig-4 is .a-

nace in horizontal section. Fig. Sisalp nsectional plan, the bottom halfof the sec-ox:

tion being taken'on the line IV.IV..of Fig. 3,. the top half 'ofthe sect-ion beingtaken on the line-IV. Fig. 5 is asectiorial end elevation of the'apparatus on the line Y1V of Fig. 3. Fig. 6 is a-siinilar sectional end elevation. through the; heating chamber of the furnace, on the line VI.VI of Fig. 3. Figs? is a sectional end'elevat-ion throi'igh the combustion" chamber of the ann'eali'iig furnace, on the irregular line VII VII-Of' Fig. 3. Fig. 8 is a sectional end elevation shou'ing the gas inlet opening leadingfrom the gas fines into the pot cooling chamber of the annealing furnace, this section""b'eii1g taken on the line VIIIVIII of Fig.

Fig. is a longitudinal sectional eleyation showing a modified form of-furnace 'and Fig. 10 is a plan View of the same.

' In the drawings, referring (oFigs lf to .8, 2- represents the pot heating compartment or chamber of, my improved furnace and 3 is the combustion chamber, which is located intermediate of the-heating chamber 2 and a gas heating chamber 4'. The combustion cl'iainber 3 is; supplied with air through ports Jlocatedin the end wall of thecoml'iustion chamber, as is clearly shown in Figs. 1, 2 and 5. Air is supplied to the ports 5 through fines or pipes 6 whichare connected to the outlets on the heaters T mounted'in the air heating chamber- 8.

which is located below the heating chamber 2 of the furnace. q A

by means of a suitable" The air is supplied blower. through the air pipe- 9 and branch pipes 10 to the inlet side of the heaters T in the air heating chamber 8. the air passing vertical legs 11 of the-pipe 6, which is shown I by dotted lines in Fig. 2.

Gas is's pplied to the gas heating chamher 4 through the gas fine 12 and the branch any other desired manner, and the products.

of combustion are caused to travel through and pass from the heating chamber 2, downwardly through the connect-ing flue 15 into the air heating chamber 8 where the heat of these out oing burned gases is utilized to heat the an passing through the heaters and then passing outwardly through the stack flue 16 to the furnace stack.

with the material to be annealed are placed in front of the'inlet opening in the end of the heating chamber 2, these pots resting upon water cooled skid'pipes 18 which ex- 4 tend lengthwise through the heating chainher 2 combustion chamber 3 and gas heating chamber 4 of the furnace.

-,As shown in Fig.1, a pusher 19 is employed to cause the pots to pass gradually through the furnace by a step by step movement.- As the pot is introduced into the heating chamber 2, one is moved outfrom the door or opening in the opposite end of the furnace in the gas heating chamber 4.

In the operation of the annealing furnace 17 are successively placed in position in front of the pusher 19 by means of a traveling crane or other suitable pot handling device and the piston of the pusher 19 is caused to actuate so as to move the annealing pots 17 resting on the skid pipes 18 into the furnace. After thefurnace' becomes filled with the annealing pots, when a pot is introduced, one is caused to issue from the opposite'end of the furnace. The furnace'is of considerable length, and, while thepots are assin throu h the heatin chamber 2 D h :5

of this furnace, they and their contents become highly heated by contacting with the burned gases passing through the chamber 2 from the combustion chamber The" pots are passed through the combustion chamber 3 from the heating chamber .2, and are then caused to slowly move through the gas heating chamber 4. .In this chamber 4 the cold,

. or relatively cold, gases entering through the gas ports are brought into contact with the outersurface s of the highlyheated pots and cause these pots and their contents to gradually become cooled in a non-oxidizing atmosphere during their passage through the gas heating chamber 4. Thegases, by coming in contact with the surfaces of the heated pots, becomev highly heated and, on enteringfthe combustion chamber 3, from the chamber 4:, are there mined with the air passing from the air ports 5 and areburn'ed,

the resulting products of combustion passtact with the air heaters 7 and heat the air ures, like parts being marked with like mun- The annealing pots 17, after being filledoxidizing atmosphere, preventofrichzation of thenecessity for gas regenerators and utiliz tents.

ing forwardly into the pot heating chamber 2, where they contact with and heat the pots and materials in the pots while in this chamber, then passing into the air heating chamber 8 where they are brought into conduring its passage through the air heaters 7 in the chamber 8, the air becomingheated before issuing finally from the ports in the combustion chamber 3.

- In the modification shown in Figs. 9 and 10, the arrangement of the pot heating chamber, combustion chamber and gas heating chamber is the same as in the preceding fighers with the letter a applied thereto, and the pots, instead of being moved into and out of the furnace through doors located in its end walls, are placed in and are taken from the furnace through suitable openings in the ends of the roof of the furnace. These openings arenormally closed by means of a cover mounted on wheels so as to behorizontally movable upon the track wheels, as is shown in the drawings. After the pots have been introduced through the openings in the roof of the furnace shown in Figs. 9 and 1.0, the operation is the same as in the preceding figures until they have reached the opposite end of the furnace, when they are removed through the. opening in the by my lmproved method, the annealing pots roof at the cooling chamber end of the fur- 'iiace.

"l'jThe advantage of my improved method will be apparent to those skilled in the art. ;-,nstead of heating the annealing pots and eir contents and then removing the pots from the furnace while in a highly heated condition, and afterward allowing-Y the pots toicool by contact with the atmosphere while without the furnace, the'pots-ar'e gradually cooled by contact with the unburned gases passing to the combustion chamber of the furnace and these gases, fornting a nonthe pots and verymaterially increase their life. The gases, by contacting with the highly heated pots during their passage}? through the gas heating chamber, become" highly heated and when leaving the cooling" chamber are in the best )ossible condition. 2:

for mixing with the air in the combustion cl-iamberof the furnace, in this way avoiding employed for moving the pots through the furnace may be varied and other changes may be made Without departing from my invention.

1. In the art of annealing, the method of saving heat consisting in passing annealing pots and their contents through a furnace and bringing the annealing pots into contact therein with the burning gases to heat the ptsand then 'ivith the unburned gases to thereby heat the unburned'gases.

2. In the art of annealing, the method of saving heat consisting in passing anneallng pots and their contents through a furnace and therein heating the pots by contact with the burned and burning gases and heating the unburned gases by contact with the heat-- ed p0ts, passing the burned gases from the heating chamber through an air heating chamber and heatmg by radiation air sup plied thereto, then mixing and burning the mixed heated air and heated unburned gases within the combustion chamber of the furnace.

3. In the artof annealing the method of saving heat consisting in passing the articles to be annealed through a heating furnace, heating the'articles by the burned and burning gases and then heating the unburned gases by radiation from the heated articles and thereby effecting an interchange of heat between the annealed articles and their retainers with the unburned gases and thereby reducing the temperature of the annealed articles and-raising that of the unburned gases.

In testimony whereof, I have hereunto set my hand.

FRED H. DANIELS.

Witnesses GEO. Smunm, G. I). BOYD. 

